libstdc++
bits/functional_hash.h
Go to the documentation of this file.
1 // functional_hash.h header -*- C++ -*-
2 
3 // Copyright (C) 2007, 2009 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file bits/functional_hash.h
26  * This is an internal header file, included by other library headers.
27  * You should not attempt to use it directly.
28  */
29 
30 #ifndef _FUNCTIONAL_HASH_H
31 #define _FUNCTIONAL_HASH_H 1
32 
33 #pragma GCC system_header
34 
35 #ifndef __GXX_EXPERIMENTAL_CXX0X__
36 # include <c++0x_warning.h>
37 #endif
38 
39 #if defined(_GLIBCXX_INCLUDE_AS_TR1)
40 # error C++0x header cannot be included from TR1 header
41 #endif
42 
43 #if defined(_GLIBCXX_INCLUDE_AS_CXX0X)
45 #else
46 # define _GLIBCXX_INCLUDE_AS_CXX0X
47 # define _GLIBCXX_BEGIN_NAMESPACE_TR1
48 # define _GLIBCXX_END_NAMESPACE_TR1
49 # define _GLIBCXX_TR1
51 # undef _GLIBCXX_TR1
52 # undef _GLIBCXX_END_NAMESPACE_TR1
53 # undef _GLIBCXX_BEGIN_NAMESPACE_TR1
54 # undef _GLIBCXX_INCLUDE_AS_CXX0X
55 #endif
56 
57 
58 namespace std
59 {
60  struct error_code;
61 
62  template<>
63  size_t
64  hash<error_code>::operator()(error_code) const;
65 }
66 
67 #endif // _FUNCTIONAL_HASH_H
68 
ISO C++ entities toplevel namespace is std.